Recently moved to Tucson, pool was not kept up. Already replaced filter and pump, now getting to the light. The light was full of water (breaker has been off since moved in). Took it out and all the was left of identifying marks is below. I'd like to switch to color changing LED, ideally Pentair, but the light clearly says Hayward. The bulb diameter is 4 inches. The niche cover is 5.75 inches in diameter. Any ideas? 
